I want to design a tank to hold liquid propane. The proposed tank would have one inlet valve, one output valve, and no sharp edges. I've read that the pressure required to maintain propane in a liquid form at 100 degrees Fahrenheit is 177 psi.
An example analogous to my case; I have a spherical, 40 sq. in. tank in which I want to store liquid propane. If propane must be held at a pressure of 177+ psi to remain in liquid form at 100 degrees Fahrenheit, then the tank must be able to withstand 177 psi * 40 sq. in. = 7080 lbs at all points of the tank's surface. What material properties should I look at to find a material suitable to withstand that force? I want to think tensile strength, but would like an expert's advice.